Igniter for explosive-engines.



Hl. G. KROEGER. .IGNITER PoR B/XPLosIvE ENGINES, APPLIUATIION FILED DEO. 14, 1911.

Patented Apr.- s, 1913.

2 SHEETS-SHEET 2.

HERRMNN G. KRGEGER, OF LOUISVILLE, KENTUCKY.

4IG-NI'EEIB, FOR EXPLOSIVE-ENGINES.

rossore.,

i Speccation of Letters Patent.

Application llledillecember 14, 19,11. Serial No. 665,704.

To all whom may concern.'

`at Louisvilla'in the county of Jeii'erson and State of Kentuc have invented certain new and useful' m rovements in Igniters for Explosive-Engines, of which th .following is a specifica-tion. f

This invention relates to electric igniters for explosive engines. A. l. v

llt is one aim of the 'invention to rovide an igniter constructedl and arrange to simultaneously produce two sparks 1n the engine cylinderor in each engine cylinder, at each conta-ct ot the timer, so that'more rapid combustion othecxplosive mixture will take place, with the result that the enginewill be rendered more eilicient in its'action and less Lfuel will be consumed.

The igniter embodying the'present inven- W ith these and other objects in view asf will more fully appear as 'theJ description proceeds, the invention consists in certain constructions, arrangementsfand combinations of the parts that I shall hereinafter fully describe and claim. l

.For a full understanding of' theinvention reference is to be hade to the following description .and accompanying ,dra-wing, in which: H

Figure 1 is a plan view'of the igniter em bodying the present invention; Fig. 2 is a View '1n side 'elevation thereof; Fig. 3 is a group view illustrating the armature of the vibrator; and Fig-4 is a diagrammatic view illustrating the circuits through theigniter;

Corresponding and like parts are referred to iu the following description and indicated in all the views of the drawing by the same reference characters.

lt will be readily understood that the igniter embodying the inventxoumay "he mounted in any desired manner, depending veneuce, it is here shown as arranged withm a caslng which is indicated in general by the reference numeral 1, and includes a hinged cover 2 which may be opened` Vto permit of access to the vibrator for the purpose of adjusting the same. I

Mounted Within the casing are two coils, one indicated by the numeral 3 and the other by the numeralfl,4 and the coil 3' includes a primary winding 5 'and a secondary winding 6. The core of this coil is indicated by the numeral 7. The coil 4 includes a primary Winding 8, la, secondary .winding 9, and' acore 10. While the coils may be `mounted in any desired manner within the casing, it is preferable that threaded binding posts 11 and 12 be fixed at corresponding ends of the cores 7'and 10,

respectively, and these binding posts are in` serted through openings in one wall oft-he casing and 'liavearranged thereon bindin Patented Apr. 8, 1913.

nuts 13 and 14, respectively..l Tothese bin 111g posts are connected the con;lucor wires which-lead to the spark plugs', as will be presently explained.

Mounted as at 15 in la bracket 16 ar,- ranged between the coils 3 and 4 at their ends vopposite their ends at which the binding posts'll and 12 are located, is an armature 17 having arms extending in opposite directions from its axis and arranged to vibrate between the adjacentn` ends of the cores 7 and .10, and contact screws which are positioned' opposite the said ends of the cores, as will4 now beexplained. Brackets 18 are mounted upon the said ends of the coils and have portions extnding in spaced relation to said ends of the cores 7 and 10,

and through that bracket 18 which is mount ed upon the coil 3 there is adjustably threaded al contact screw lfl'having its contact point opposing the adjacent end ofthe core A similar screw 20 is adjustably threaded through the other bracket 15, and has its contact point opposing the adjacent end `of the core 10. The brackets 18 are split as at 21, and screens 22 are threaded through the split portions and may be tightened to hold the contact-screws at adjustment. The upper face of eachA arm of the armature 17 is recessed .as at 23, and secured to each arm near its inner end is a leaf spring 2i hav ing a contact point upon its upper face upon'vrhether it is used in connection with near its\free end these leaf springs proa marine motor, an automobile niotonor a stationary motor, but as a matter of conject-ing over the recesses in the respective arms of the armature to allow for their vibration. Atthis point, itwill be readily understood that the arms of the armature are designed to contact with the upper ends of the cores 7 and 10, and thatl the contact screws 19 and 20 are designed to contact with the points 25 of the respective leaf springs 21, during the vibration of the armature, and it will be further lunderstood that the amplitude of vibration of thel -armature may be adjusted b means of the contact screws 19' and 20. s a means for insuring the contact of one arm of the armature 17 with'its respective core and to pre- Vent the armature assuming a position withl both arms out of contact with the cores of the coils, a leaf spring 26' is secured to one of the coils, for example, the coil 3, and bears lightly against the spring 24 up'on the adjacent arm of the armature.

Referring` to Fig. 4 of the drawings, the numeral 27 indicates a timer of ordinary type and 28 indicates the contact block of 'the timer. The contact member with which the timer cooperates is indicated b the numeral 29. The battery for the primary circuit is indicated by the numeral 30, and at 31there is shown diagrammatically the cylinder of the engine in connection with which the igniter is used. Into this cylinder Lat. diam'etricarlly opposite points are threaded the bases of two spark plugs, one of which is indicated by the numeral 32 and the other by the numeral 33, the binding` posts of the plugs being indicated, respectively, by the numerals 3i and 35. A conductor wire 3G leads from the contactmeinber 29 to the piyot of the armature 17, and from the timer 27 leads a wire 37 which is connected to one terminal of the battery 30. A wire 31 leads from the other terminal of the battery, and is connected to the primary wi'ndings 5 and S of the coils 3 and 4, respectirbly. The.other terminal of the primary winding?) is connected by a wire 38 with contact screw 19, and a wire 39 connects the other terminal of the primary winding 3 with the cont-act screw 20. This completes the primary circuit, and there is preferably interposed in this circuit, for example, in the wire 36, 'a switch 40, by means of which the circuit may be opened and closed. A wire 41 is connected to binding post 11 and to the binding post 3st of the'spark plug 37, and a wire 42 connects the binding post 12 of the coil 4 with the binding post 35 of the spark plug The other terminals of the secondary windings ot' the two coils are connected by a wire 4.3.

ll'licn the switch 4Q is closed and the timer 27 is 1ct-ating, the primary circuit'is interinittcntly closed, and when closed will be.

from the battery 30, through the timer 27, the wire 36, and to the armature 17. Assuming that the armature is normally held by the spring 26 in contact with the contact screw 20, the primary circuit will then ex. tend through the said armature and screw, through the primary winding of the coil t and back through the wire 31 to battery 30. This results in an energization of the coil .4 and the armature is then attracted to the core of this coil, bringing the spring at the other end of the armature into contact: with the screw 19. The primary circuit is then from battery 30, through timer 27, wire 36, the armature 1,7, screw 19, primary winding of coil 3,/ and back to battery through wire 31. (loil 3 is in this manner energized, attracting the armature to its core. This operation is rapidly repeated, and the armature 17 is rapidly yibrated. As a result of the successive energization of the primary windings of the coils 3 and 4, the current is induced in the secondary windings of these coils and passes through the wires 4:1 and 42 to the binding posts of the spark plugs 32 and 33, respectively, and leaping across the spark gaps ot the plugs, passes to ground through the engine cylinder and bed. As before stated, the spark` plugs are located at diametrically opposite points upon the engine cylinder, and as a consequence there is a more rapid coinbustion of the explosive mixture than would take place if but one spark plug was used. lAlso, as before stated, the peculiar arrange- "ment ot the armature and the 'tact that the contact screws 19 and 20 are adjustable to adjust the amplitude of Vibration of thesaid armature, the current induced in the sccondary windings of the coils is of high trequency, and better results are secured than by the use of a single coil.

'Haring thus described my inyention, what I claim is: y

1. In an ignition system for explosive cngines, spark plugs located in spaced relation ,upon the enginecylim'lcr and in circuit therewith to ground. a ]n'i1na1y and a secondary circuit. coils haring cach a primary and a secondary winding respectively in .said circu/its, each ot the said spark plugs being in circuit with the secondary winding of one ot the coils, the secondary` windings of the two coils being electrically connected, and yibratory circuit closing means 't'or the primary circuit.

2. ln an ignition system for explosive engines. spark plugs located at spaced points upon the engine cylinder and having their basesl biidged by the said cylinder, a primary and a secondary circuit, coils haring each a primary and a secondary winding rcspcctiycly in said circuits. the binding post ot' each spark plug being in vcircuit with the secmidary winding of one coil, the secondary windings ot' thc two coils being electrically connected, and yibratory circuit closing means in the primary circuit.

3. In `an electric iguiting device, a privthe other terminals of the secondary windterminals of the spark plugs whereby a currentinduced in the secondary windings will be grounded across the spark gaps of the spark plugs. i

In testimonyv whereof I aix my signature `inypresence of two witnesses.

HERMANN G. KROEGER. fr. 5.]

mary and a secondary circuit, coils having each a primary and a secondary winding respectively in said circuits, a source of electric supply for the primary circuit, a vibratory armature common to both coils and located in the primary circuit, two of the terminals of the secondary windings being electrically connected, and independent Spark plugs each having a ground terminal, i Vitnesses:

' R. E. HARRYMAN,

ings being connected one to each of the other NELLm M. JONES. 

